Intraday price change for VRTX is about $4.22 from the day's low to the day's high.
The previous business day's price range from the open of $156.79 is expected to range from a low of $154.61 to a high of $158.83.
Price moves beyond this range are outside the average.
The previous business day's closing price may be between $156.81 and $156.77 assuming average price movements.
Note that events including news, VRTX earnings, or broad market swings will unexpectedly affect price.
Closing prices outside of this range indicate a move outside the average closing price movement.